Introduce ThreadedInputConnection behind a switch

content/renderer/ime_event_guard.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_IME_EVENT_GUARD_H_
 #define CONTENT_RENDERER_IME_EVENT_GUARD_H_
 
 namespace content {
 class RenderWidget;
 
 // Simple RAII object for guarding IME updates. Calls OnImeGuardStart on
 // construction and OnImeGuardFinish on destruction.
 class ImeEventGuard {
  public:
   explicit ImeEventGuard(RenderWidget* widget);
-  ImeEventGuard(RenderWidget* widget, bool show_ime, bool from_ime);
   ~ImeEventGuard();
 
   bool show_ime() const { return show_ime_; }
   bool from_ime() const { return from_ime_; }
   void set_show_ime(bool show_ime) { show_ime_ = show_ime; }
   void set_from_ime(bool from_ime) { from_ime_ = from_ime; }
 
  private:
   RenderWidget* widget_;
   bool show_ime_;
   bool from_ime_;
 };
 }
 
 #endif  // CONTENT_RENDERER_IME_EVENT_GUARD_H_